Periodic Acid Modification of Chemical-Bath Deposited SnO₂ Electron Transport Layers for Perovskite Solar Cells and Mini Modules.

ABSTRACT: Chemical bath deposition (CBD) has been demonstrated as a remarkable technology to fabricate high-quality SnO₂ electron transport layer (ETL) for large-area perovskite solar cells (PSCs). However, surface defects always exist on the SnO₂ film coated by the CBD process, impairing the devices' performance. Here, a facile periodic acid post-treatment (PAPT) method is developed to modify the SnO₂ layer. Periodic acid can react with hydroxyl groups on the surface of SnO₂ films and oxidize Tin(II) oxide to Tin(IV) oxide. With the help of periodic acid, a better energy level alignment between the SnO₂ and perovskite layers is achieved. In addition, the PAPT method inhibits interfacial nonradiative recombination and facilitates charge transpor

SUBMITTER: Wu Z 

PROVIDER: S-EPMC10369290 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature